<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="text" placeholder="请输入关键字">
    <script>
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        // 防抖核心函数
        function center(){
            console.log('防抖防抖');
        }

        oInpt.onkeyup = decount(center,500);

       function decount (fn,time) {
        let timeout = null
            return ()=>{
                clearTimeout(timeout)
                timeout= setTimeout(()=>{
                    fn()
                },time)
            }
        }
    </script>
</body>
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